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Calculez l'écart-type, la variance et les statistiques associées d'un ensemble de données. Prend en charge les calculs sur échantillon et sur population.
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Calculateur d'Écart-type
Calculez l'écart-type, la variance et les statistiques associées d'un ensemble de données. Prend en charge les calculs sur échantillon et sur population.
Entrées
Entrez les valeurs requises pour le calcul
Résultats
Voir les résultats du calcul
Entrez les valeurs ci-dessous pour calculer
Qu'est-ce que Standard Deviation?
Standard deviation mesure le montant de variation ou dispersion dans a dataset. A low standard deviation indique values are close à the mean, while high standard deviation indique values are spread out. It est widely used dans finance à measure volatility, dans manufacturing pour quality control, et dans research à measure données reliability. Sample standard deviation (n-1) provides un unbiased estimate pour population données.
Comment utiliser
Enter your dataset values separated par commas, spaces, ou new lines. Select whether your données représente a sample (using n-1) ou the entire population (using N). The calculateur calcule standard deviation, variance, mean, median, range, coefficient de variation, et other statistical mesure.
Questions fréquentes
What is standard deviation?
Standard deviation is a measure of the amount of variation or dispersion of a set of values. A low standard deviation indicates that the values tend to be close to the mean of the set, while a high standard deviation indicates that the values are spread out over a wider range.
What is the difference between Sample and Population?
Use 'Population' when your data set includes every member of the group you want to study. Use 'Sample' when your data represents a subset of a larger group. The calculation formulas differ slightly (Sample divides by N-1, while Population divides by N) to provide an unbiased estimate.
How do I input my data?
You can enter numbers separated by commas, spaces, or new lines. For example, you can paste a column directly from Excel or a CSV file. The calculator will automatically filter out non-numeric characters.
What is Variance?
Variance is the square of the standard deviation. It represents how far each number in the set is from the mean. While standard deviation is expressed in the same units as the original data, variance is expressed in those units squared.
Why is my result 0?
A standard deviation of 0 means that all the numbers in your data set are exactly the same. There is no variation or spread between the values.
What does Count (N) mean?
Count, often represented as 'N', simply refers to the total number of valid data points or observations you have entered into the calculator.
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